已知(x+根号二)/(x-2)÷(x²+4x+4)/(x²-4),其中x满足(x-2)(x+3)=0 先化简在求值
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已知(x+根号二)/(x-2)÷(x²+4x+4)/(x²-4),其中x满足(x-2)(x+3)=0 先化简在求值
已知(x+根号二)/(x-2)÷(x²+4x+4)/(x²-4),其中x满足(x-2)(x+3)=0 先化简在求值
已知(x+根号二)/(x-2)÷(x²+4x+4)/(x²-4),其中x满足(x-2)(x+3)=0 先化简在求值
(x-2)(x+3)=0
x=2(舍去),x=-3
(x+根号二)/(x-2)÷(x²+4x+4)/(x²-4)
=(x+根号二)/(x-2)÷(x+2)²/(x+2)(x-2)
=(x+根号二)/(x-2)÷(x+2)/(x-2)
=(x+根号二)/(x+2)
=(-3+根号二)/(-3+2)
=3-根号2